25. Write the expression as a sum and/or difference of logarithms with all variables to the first degree. 5y In 3z 5y In 3z 26. Express the expression in terms of u and v, where u = In k and v = In m. In 8 m 5 K In (Simplify your answer.) 8 m 27. Evaluate the expression. log ,835 log 9835 = (Simplify your answer. Type an integer or decimal rounded to six decimal places as needed.)